Matt Turner <matts...@gmail.com> writes: > Three-source instructions have a vertical stride overloaded to 4, which > prevents directly using vec4 uniforms as arguments. Instead we need to > insert a MOV instruction to do the replication for the three-source > instruction. > > With this in place, we can use three-source instructions in the vertex > shader. While some thought needs to go into deciding whether its better > to use a three-source instruction rather than a sequence of equivalent > instructions (when one or more sources are uniforms or immediates), this > will allow us to skip a lot of ugly lowering code and use the BFE and > BFI2 instructions directly.
These are: Reviewed-by: Eric Anholt <ericAnholt.net>
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